Preparation of N-(-3(((aryl)amino)suldonyl)-1H-1,2,4-triazol-5-yl)amines
    45.
    发明授权
    Preparation of N-(-3(((aryl)amino)suldonyl)-1H-1,2,4-triazol-5-yl)amines 失效
    N - ( - 3(((芳基)氨基)磺酰基)-1H-1,2,4-三唑-5-基)胺的制备

    公开(公告)号:US4937350A

    公开(公告)日:1990-06-26

    申请号:US361618

    申请日:1989-06-05

    CPC分类号: C07D249/14

    摘要: N-(3-(((2,6-Dihalophenyl)amino)sulfonyl)-1H-1,2,4-triazol-5-yl)amines, intermediates for the preparation of herbicidal substituted 1,2,4-triazolo(1,5-a)pyrimidine-2-sulfonanilides, are directly prepared from an appropriataely substituted 4-bromoaniline and a protected 5-amino-1,2,4-triazole-3-sulfonyl chloride. The improved reaction scheme involves the individual reaction steps of (a) coupling, (b) halogenation and (c) reduction.